In the case of Jim Cook its is 38!!
Generally speaking, mental disabilities such as the antiquated term retardation are diagnosed anytime before the age of 18. Specifically though, it is possible to reach a diagnosis as early as 24 months.
Mental retardation is a developmental disability that first appears in children under the age of 18.
Mental retardation begins in childhood or adolescence before the age of 18. In most cases, it persists throughout adult life
The healthcare system is reluctant to diagnose mental retardation any earlier than school age even as late as 13.
Mental retardation begins in childhood or adolescence before the age of 18. In most cases, it persists throughout adulthood.
Using diagnostic criteria set forth in manuals such as DSM and ICD. Assessments involve tests of intelligence such as the WISC, WJ, PTONI, and DTLA. Concurrent deficits in adaptive behavior are also required for the diagnosis. Mental retardation is a developmental disorder. Therefore, it is diagnosed early in life.
Some cases of mild mental retardation are not diagnosed before the child enters preschool. These children typically have difficulties with social, communication, and functional academic skills.
Overstudy does not cause mental retardation.
IQ is not strongly associated with age. An IQ of 56 represents mental retardation, but nothing about the person's age.
TThere are quite high as it comes in different types of mental retardation.
literature review on mental retardation with reference
Exposure to lead can also cause mental retardation.